A blockage detection method for rain gauge

Abstract

This application provides a blockage detection method for rain gauges, belonging to the field of rainfall monitoring, to address the problem of poor reliability of rainfall monitoring devices in related technologies. In this method, rainfall monitoring data is collected using a rainfall monitoring module, and rainfall intensity monitoring data is collected using a rainfall intensity monitoring module. The device status data is then determined by combining the rainfall monitoring data and the rainfall intensity monitoring data, so as to avoid difficulty in detecting distorted or erroneous rainfall monitoring data. This method is beneficial for timely detection of rain gauge blockage failure caused by debris, and even after rainfall monitoring fails, rainfall intensity monitoring can still maintain a certain monitoring effect on rainfall conditions, thereby enabling more reliable monitoring of rainfall conditions.

Description

Technical Field

[0001] This application relates to the field of integrated monitoring of two variables, rainfall and rainfall intensity, and particularly to a method for detecting blockages in rain gauges. Background Technology

[0002] Rainfall is one of the main factors causing flood disasters, so rainfall monitoring is also one of the main means of flood forecasting. At present, rainfall monitoring is generally achieved through rain gauges, and the tipping bucket rain gauges are the most commonly used in practice. The structure of the tipping bucket rain gauge makes it easy for it to be affected by debris such as leaves, flying catkins, pine cones, dust, and insect carcasses, which can cause blockage and make rainfall monitoring malfunction. Summary of the Invention

[0003] This application provides a blockage detection method for rain gauges, which avoids the monitoring failure caused by blockage in traditional rain gauges by comprehensively monitoring both rainfall and rainfall intensity. It creatively realizes the comprehensive representation of rainfall conditions using both rainfall and rainfall intensity parameters, which is conducive to more reliable monitoring of rainfall conditions.

[0004] The clogging detection method for rain gauges provided in this application specifically adopts the following technical solution:

[0005] A method for detecting blockages in a rain gauge, comprising a rainfall monitoring module, a rainfall intensity monitoring module, and a result analysis module;

[0006] The rainfall monitoring module is used to collect rainfall monitoring data;

[0007] The rainfall intensity monitoring module is used to collect rainfall intensity monitoring data. The rainfall intensity monitoring module includes a glass plate and an infrared emitting unit and an infrared receiving unit disposed on one side of the glass plate. The infrared emitting unit is used to emit parallel infrared light to the glass plate, and the infrared receiving unit is used to receive the parallel infrared light reflected by the glass plate. The other side of the glass plate is used to collect raindrops. When raindrops are collected on the glass plate, the refractive index of the parallel infrared light is changed so that the rainfall intensity monitoring module can determine the rainfall intensity monitoring data.

[0008] The result analysis module is connected to the rainfall monitoring module and the rainfall intensity monitoring module, and receives the rainfall monitoring data and rainfall intensity monitoring data to determine the device status data.

[0009] The result analysis module is configured as follows:

[0010] The rainfall monitoring data is converted into the first monitoring data;

[0011] The rainfall intensity monitoring data is converted into second monitoring data;

[0012] The result of subtracting the second monitoring data from the first monitoring data is the monitoring gap data;

[0013] Determine the relationship between the monitored gap data and the pre-acquired negative phase gap threshold;

[0014] If the monitoring gap data is less than the negative phase gap threshold, the device status data is determined to be that the rainfall monitoring module is blocked.

[0015] Otherwise, the device status data is judged to be normal.

[0016] By adopting the above technical solution, the rainfall monitoring data obtained by the rainfall monitoring module and the self-designed rainfall intensity monitoring module are cross-verified to determine whether the device is blocked. This prevents the rainfall monitoring data from being distorted or incorrect and thus helps to detect rainfall monitoring failure caused by debris in a timely manner. Furthermore, even if the rainfall monitoring fails, the rainfall intensity monitoring can still maintain a certain monitoring effect on the rainfall situation, thereby enabling more reliable monitoring of rainfall conditions.

[0017] Furthermore, the wavelength range of the parallel infrared light is 800nm-900nm.

[0018] Furthermore, the result analysis module is further configured to: when the monitored gap data is not less than the negative phase gap threshold,

[0019] Determine the relationship between the monitored gap data and the pre-acquired positive phase gap threshold;

[0020] If the monitoring gap data is greater than the positive phase gap threshold, the rainfall intensity monitoring data and rainfall monitoring data are judged to be abnormal data.

[0021] If the monitoring gap data is not greater than the positive phase gap threshold, the monitoring result data is determined based on the rainfall intensity monitoring data and the rainfall monitoring data.

[0022] Furthermore, the determination of monitoring result data based on rainfall intensity monitoring data and rainfall amount monitoring data includes:

[0023] Let the rainfall monitoring data be a, the rainfall intensity monitoring data be b, and the first monitoring data be... The second monitoring data is If the monitoring result data is c, then The monitoring results data carry timestamps for rainfall monitoring data and rainfall intensity monitoring data.

[0024] Furthermore, the result analysis module is further configured to: determine the stage rainfall data based on the detection result data within a preset time period;

[0025] Suppose there are n monitoring result data within a preset time period, and the i-th monitoring result data is... The first monitoring data corresponding to the i-th monitoring result data is The second monitoring data is The confidence level of the i-th monitoring result is If the rainfall data for a given period is C, then... , .

[0026] Furthermore, the rainfall intensity monitoring module also includes a housing, with a glass plate covering one side of the housing to form a structure that encloses the infrared emitting unit and the infrared receiving unit, and the glass plate is used to catch raindrops upwards.

[0027] Furthermore, the rainfall monitoring module is a tipping bucket rain gauge.

[0028] In summary, this application has at least the following beneficial effects:

[0029] A method for detecting blockages in rain gauges is provided, which helps to detect rain gauge malfunctions in a timely manner and ensures a certain level of monitoring capability for rainfall conditions even after rain gauge malfunctions, thereby improving the reliability of rainfall condition monitoring.

[0030] It should be understood that the description in the Summary Section is not intended to limit the key or essential features of the embodiments of this application, nor is it intended to restrict the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0031] The above and other features, advantages, and aspects of the embodiments of this application will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0032] Figure 1 A schematic diagram of the rain gauge in an embodiment of this application is shown;

[0033] Figure 2 A schematic diagram of the rainfall intensity monitoring module in an embodiment of this application is shown;

[0034] Figure 3 A flowchart of a blockage detection method for a rain gauge, as described in an embodiment of this application, is shown. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0037] This application provides a blockage detection method for rain gauges, which helps to detect rain gauge malfunctions in a timely manner and ensures a certain level of monitoring capability for rainfall conditions even after rain gauge malfunctions, thereby improving the reliability of rain gauge monitoring.

[0038] Figure 1 A schematic diagram of the rain gauge in an embodiment of this application is shown.

[0039] Reference Figure 1 The rain gauge includes a rainfall monitoring module 110, a rainfall intensity monitoring module 120, and a result analysis module 130.

[0040] The rainfall monitoring module 110 is used to collect rainfall monitoring data. Specifically, the rainfall monitoring module 110 can be configured as a tipping bucket rain gauge, which can collect rainfall monitoring data, and the collected rainfall monitoring data is determined by the number of times the bucket is tipped within a unit of time.

[0041] The rainfall intensity monitoring module 120 is used to collect rainfall intensity monitoring data.

[0042] Figure 2 A schematic diagram of the rainfall intensity monitoring module 120 in an embodiment of this application is shown.

[0043] Reference Figure 2 The rainfall intensity monitoring module 120 includes a glass plate and an infrared emitting unit and an infrared receiving unit disposed on one side of the glass plate. The infrared emitting unit is used to emit parallel infrared light to the glass plate, and the infrared receiving unit is used to receive the parallel infrared light reflected by the glass plate. The other side of the glass plate is used to collect raindrops. When raindrops are collected on the glass plate, the refractive index of the parallel infrared light is changed so that the rainfall intensity monitoring module 120 can determine the rainfall intensity monitoring data.

[0044] In this embodiment, the incident angle of the parallel infrared light illuminating the glass plate is 45°. When there is no rain on the surface of the glass plate, the glass plate will totally reflect the parallel infrared light incident at 45°, that is, the infrared receiving unit will receive all the parallel infrared light emitted by the infrared emitting unit. If there is rain on the surface of the glass plate, some of the parallel infrared light will be refracted through the glass plate, resulting in less parallel infrared light received by the infrared receiving unit. Since the area of ​​the reflection region of the parallel infrared light on the glass plate is fixed, the higher the intensity of the raindrops, the more raindrops fall in the reflection region or the larger the area of ​​a single raindrop. At this time, more parallel infrared light is refracted through the reflection region. Based on this principle, the rain intensity monitoring data can be determined according to the intensity of the infrared light received by the infrared receiving unit and the intensity of the infrared light emitted by the infrared emitting unit.

[0045] In this embodiment of the application, the wavelength range of the parallel infrared light is 800nm-900nm.

[0046] Of course, the rainfall intensity monitoring module 120 also includes a housing, and the glass plate covers one side of the housing to form a structure that encloses the infrared emitting unit and the infrared receiving unit. The glass plate is used to catch raindrops upwards.

[0047] Refer to Figure 1 The result analysis module 130 is connected to the rainfall monitoring module 110 and the rainfall intensity monitoring module 120, and receives the rainfall monitoring data and rainfall intensity monitoring data to determine the device status data.

[0048] Figure 3 A flowchart of a blockage detection method for a rain gauge, as shown in an embodiment of this application, is illustrated. This method is applied to... Figure 1 Module 130 for analyzing the results of the medium-rain gauge.

[0049] Reference Figure 3 The method specifically includes the following steps:

[0050] S310: Convert the rainfall monitoring data into first monitoring data;

[0051] S320: Convert the rainfall intensity monitoring data into second monitoring data;

[0052] S330: The result of subtracting the second monitoring data from the first monitoring data is the monitoring gap data;

[0053] S340: Determine the relationship between the monitored gap data and the pre-acquired negative phase gap threshold;

[0054] S350: If the monitoring gap data is less than the negative phase gap threshold, the device status data is determined to be that the rainfall monitoring module 110 is blocked.

[0055] S360: If the monitored gap data is not less than the negative phase gap threshold, the device status data is judged to be normal.

[0056] In the above, the purpose of converting rainfall monitoring data into first monitoring data and rainfall intensity monitoring data into second monitoring data is to unify the rainfall state values ​​represented by the two. For example, both first and second monitoring data reflect the total volume of rainwater collected per unit area per unit time. For rainfall monitoring data, the volume of rainwater collected per unit time can be obtained by multiplying the number of times the tipping bucket of the rain gauge flips per unit time by the volume of the tipping bucket. Then, this volume is divided by the area of ​​rainwater collected by the tipping bucket rain gauge to obtain the total volume of rainwater collected per unit area per unit time. Rainfall intensity monitoring data reflects the area covered by raindrops within a reflection area. The unit volume of rainwater reflected per unit area covered by raindrops can be preset, and the integral of the raindrop coverage area per unit time can be determined by the integral of the rainfall intensity monitoring data per unit time, which determines the total volume of raindrops per unit time. Then, the total volume of raindrops is divided by the area of ​​the reflection area to obtain the total volume of rainwater collected per unit area per unit time. In this way, the dimensions of rainfall monitoring data and rainfall intensity monitoring data can be unified. Of course, other methods can also be used to unify the units of measurement, but the specific methods will not be introduced one by one.

[0057] As mentioned above, the negative phase difference threshold is a preset constant that is less than zero. When the monitoring difference data is less than the negative phase difference threshold, it indicates that the first monitoring data reflecting rainfall is much smaller than the second monitoring data reflecting rainfall intensity. At this time, it can be determined that the rainfall monitoring module 110 is blocked.

[0058] Of course, when the monitoring gap data is not less than the negative phase gap threshold, the relationship between the monitoring gap data and the pre-acquired positive phase gap threshold is determined; if the monitoring gap data is greater than the positive phase gap threshold, the rainfall intensity monitoring data and rainfall amount monitoring data are determined to be abnormal data (the abnormality here is generally manifested as the rainfall intensity monitoring data obtained by the rainfall intensity monitoring module 120 being too large, i.e., "overestimating the value," but it is also possible that the rainfall amount monitoring module 110 is slightly blocked, in which case the residual monitoring data and rainfall intensity monitoring data can be determined to be distorted); if the monitoring gap data is not greater than the positive phase gap threshold, the monitoring result data is determined based on the rainfall intensity monitoring data and rainfall amount monitoring data. In this embodiment of the application, the positive phase gap threshold is a positive real number, the negative phase gap threshold is a negative real number, and the absolute values ​​of the positive phase gap threshold and the negative phase gap threshold are equal.

[0059] To better reflect the actual rainfall conditions, the monitoring results can be determined by combining rainfall intensity monitoring data and rainfall amount monitoring data. Specifically, determining the monitoring results based on rainfall intensity monitoring data and rainfall amount monitoring data includes: Let the rainfall amount monitoring data be a, the rainfall intensity monitoring data be b, and the first monitoring data be... The second monitoring data is If the monitoring result data is c, then The monitoring results data carry timestamps for rainfall monitoring data and rainfall intensity monitoring data.

[0060] To ensure accurate determination of rainfall patterns over a longer period, the result analysis module 130 can also determine phased rainfall data based on detection results within a preset time period; assuming there are n monitoring results within the preset time period, the i-th monitoring result is... The first monitoring data corresponding to the i-th monitoring result data is The second monitoring data is The confidence level of the i-th monitoring result is If the rainfall data for a given period is C, then... , .

[0061] In summary, this application has at least the following beneficial effects:

[0062] 1. It can promptly detect blockages in the rainfall monitoring module 110 and promptly eliminate abnormal data from the rainfall monitoring module 110;

[0063] 2. It can comprehensively reflect the actual rainfall situation by combining rainfall monitoring data and rainfall intensity monitoring data, so that the actual rainfall situation can be more accurately known;

[0064] 3. It can reasonably determine the amount of rainfall in a given period based on monitoring data over a period of time, and accurately represent the rainfall situation.

[0065] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the foregoing disclosed concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A method for detecting blockages in a rain gauge, characterized in that, The rain gauge includes a rainfall monitoring module (110), a rainfall intensity monitoring module (120), and a result analysis module (130). The rainfall monitoring module (110) is used to collect rainfall monitoring data; The rainfall intensity monitoring module (120) is used to collect rainfall intensity monitoring data. The rainfall intensity monitoring module (120) includes a glass plate and an infrared emitting unit and an infrared receiving unit disposed on one side of the glass plate. The infrared emitting unit is used to emit parallel infrared light to the glass plate, and the infrared receiving unit is used to receive the parallel infrared light reflected by the glass plate. The other side of the glass plate is used to collect raindrops. When raindrops are collected on the glass plate, the refractive index of the parallel infrared light will change so that the rainfall intensity monitoring module (120) can determine the rainfall intensity monitoring data. The result analysis module (130) is connected to the rainfall monitoring module (110) and the rainfall intensity monitoring module (120), and receives the rainfall monitoring data and rainfall intensity monitoring data to determine the device status data; The result analysis module (130) is further configured as follows: The rainfall monitoring data is converted into the first monitoring data; The rainfall intensity monitoring data is converted into second monitoring data; The result of subtracting the second monitoring data from the first monitoring data is the monitoring gap data; Determine the relationship between the monitored gap data and the pre-acquired negative phase gap threshold; If the monitoring gap data is less than the negative phase gap threshold, the device status data is determined to be that the rainfall monitoring module (110) is blocked; Otherwise, the device status data is judged to be normal; The result analysis module (130) is further configured to: when the monitoring gap data is not less than the negative phase gap threshold, Determine the relationship between the monitored gap data and the pre-acquired positive phase gap threshold; If the monitoring gap data is greater than the positive phase gap threshold, the rainfall intensity monitoring data and rainfall monitoring data are judged to be abnormal data. If the monitoring gap data is not greater than the positive phase gap threshold, the monitoring result data is determined based on the rainfall intensity monitoring data and the rainfall monitoring data. The process of determining the monitoring result data based on rainfall intensity monitoring data and rainfall amount monitoring data includes: Let the rainfall amount monitoring data be a, the rainfall intensity monitoring data be b, and the first monitoring data be... The second monitoring data is If the monitoring result data is c, then The monitoring results data carry timestamps for rainfall monitoring data and rainfall intensity monitoring data; The result analysis module (130) is further configured to: determine the stage rainfall data based on the detection result data within a preset time period; Suppose there are n monitoring result data within a preset time period, and the i-th monitoring result data is... The first monitoring data corresponding to the i-th monitoring result data is The second monitoring data is The confidence level of the i-th monitoring result is If the rainfall data for a given period is C, then... , .

2. The clogging detection method for rain gauges according to claim 1, characterized in that, The wavelength range of the parallel infrared light is 800nm-900nm.

3. The clogging detection method for rain gauges according to claim 2, characterized in that, The rainfall intensity monitoring module (120) also includes a housing, and a glass plate is fitted onto one side of the housing to form a structure that encloses the infrared emitting unit and the infrared receiving unit. The glass plate is used to catch raindrops upwards.

4. The clogging detection method for rain gauges according to any one of claims 1-3, characterized in that, The rainfall monitoring module (110) is a tipping bucket rain gauge.

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